Mariners vs Tigers Prediction, Odds, Moneyline, Spread & Over/Under for ALDS Game 1 on Oct. 4

Odds updated as of 8:12 a.m.

The Seattle Mariners versus the Detroit Tigers in Game 1 of the ALDS is on the MLB schedule for Saturday.

Here's what you need to know before checking out today's MLB odds and spreads on FanDuel Sportsbook.

Mariners vs Tigers Game Info

• Seattle Mariners (90-72) vs. Detroit Tigers (87-75)
• Date: Saturday, October 4, 2025
• Time: 8:38 p.m. ET
• Venue: T-Mobile Park -- Seattle, Washington
• Coverage: Fox Sports 1

Mariners vs Tigers Odds & Moneyline

• All MLB odds, betting lines and prop bets are available on FanDuel Sportsbook.
• Moneyline: SEA: (-225) | DET: (+188)
• Spread: SEA: -1.5 (+104) | DET: +1.5 (-125)
• Total: 7 -- Over: (-110) | Under: (-110)

Mariners vs Tigers Probable Starting Pitchers

Probable Pitchers: George Kirby (Mariners) - 10-8, 4.21 ERA vs Troy Melton (Tigers) - 3-2, 2.76 ERA

The probable starters are George Kirby (10-8, 4.21 ERA) for the Mariners and Troy Melton (3-2, 2.76 ERA) for the Tigers. Kirby's team is 9-12-0 against the spread in his starts this season. When Kirby starts a game and his team is the favorite on the moneyline, they have a record of 10-8. When Melton starts, the Tigers have gone 2-2-0 against the spread. The Tigers were the underdog on the moneyline for one Melton start this season -- they won.

Mariners vs Tigers Prediction & Pick

All MLB win probability predictions and picks are according to numberFire.
Prediction: Mariners win (60.7%)

Mariners vs Tigers Moneyline

• Looking at the moneyline for Tigers-Mariners, Detroit is the underdog at +188, and Seattle is -225 playing at home.

Mariners vs Tigers Spread

• The Mariners are hosting the Tigers and are favored by 1.5 runs on the spread. The Mariners are +104 to cover the runline, with the Tigers being -125.

Mariners vs Tigers Over/Under

• A combined run total of 7 has been set for Mariners-Tigers on Oct. 4, with the over at -110 and the under at -110.

Bet on Seattle Mariners vs. Detroit Tigers on FanDuel today!

Mariners vs Tigers Betting Trends

• The Mariners have won in 66, or 59.5%, of the 111 contests they have been named as odds-on favorites in this year.
• Seattle has a record of 8-1 in contests when oddsmakers favor them by -225 or more on the moneyline.
• The Mariners and their opponents have gone over in 85 of their 157 games with a total set by sportsbooks this season.
• The Mariners are 70-87-0 against the spread in their 157 games with a line set by sportsbooks this season.
• The Tigers have won 23 of the 46 games they were listed as the moneyline underdog this season (50%).
• Detroit has not played a game this season with moneyline odds of +188 or longer.
• The Tigers have played in 158 games with an over/under set, and have combined with opponents to go over the total 79 times (79-72-7).
• The Tigers have put together a 72-86-0 record against the spread this season (covering 45.6% of the time).

Mariners Player Leaders

• Cal Raleigh has 147 hits and an OBP of .359, both of which are tops among Seattle hitters this season. He has a .247 batting average and a slugging percentage of .589.
• Among all qualified hitters in the majors, his batting average ranks 98th, his on-base percentage ranks 20th, and he is third in slugging.
• Julio Rodriguez has an OPS of .798, fueled by an OBP of .324 and a team-best slugging percentage of .474 this season. He's batting .267.
• He is 44th in batting average, 88th in on-base percentage and 38th in slugging among qualified hitters.
• Josh Naylor is batting .295 with a .462 slugging percentage and 92 RBI this year.
• Naylor brings a 12-game hitting streak into this matchup. During his last 10 outings he is hitting .444 with four doubles, a home run, two walks and seven RBIs.
• Eugenio Suarez has 49 home runs, 118 RBI and a batting average of .228 this season.

Tigers Player Leaders

• Gleyber Torres has accumulated an on-base percentage of .358, a team-best for the Tigers. He's batting .256 and slugging .387.
• Including all qualifying hitters, he ranks 77th in batting average, while his on-base percentage is 23rd and he is 118th in slugging.
• Riley Greene has racked up 155 hits while slugging .493. Both lead his team. He has a batting average of .258 with an on-base percentage of .313.
• Including all qualifying hitters, his batting average places him 69th, his on-base percentage is 104th, and he is 21st in slugging.
• Spencer Torkelson has 27 doubles, a triple, 31 home runs and 72 walks while batting .240.
• Zach McKinstry has 23 doubles, 11 triples, 12 home runs and 46 walks while hitting .259.

Mariners vs Tigers Head to Head

• 7/13/2025: 8-4 SEA (Favorite: Tigers, Spread: -1.5, Total: 8, Favorite Moneyline: -108, Underdog Moneyline: -108)
• 7/11/2025: 12-3 SEA (Favorite: Tigers, Spread: -1.5, Total: 7, Favorite Moneyline: -290, Underdog Moneyline: +235)
• 4/2/2025: 3-2 SEA (Favorite: Tigers, Spread: -1.5, Total: 6.5, Favorite Moneyline: -124, Underdog Moneyline: +106)
• 4/1/2025: 4-1 DET (Favorite: Mariners, Spread: -1.5, Total: 6.5, Favorite Moneyline: -178, Underdog Moneyline: +150)
• 3/31/2025: 9-6 DET (Favorite: Mariners, Spread: -1.5, Total: 7.5, Favorite Moneyline: -120, Underdog Moneyline: +102)
• 8/15/2024: 2-1 DET (Favorite: Mariners, Spread: -1.5, Total: 8.5, Favorite Moneyline: -136, Underdog Moneyline: +116)
• 8/14/2024: 3-2 DET (Favorite: Mariners, Spread: -1.5, Total: 8, Favorite Moneyline: -144, Underdog Moneyline: +122)
• 8/13/2024: 15-1 DET (Favorite: Tigers, Spread: -1.5, Total: 6.5, Favorite Moneyline: -126, Underdog Moneyline: +108)
• 8/8/2024: 4-3 SEA (Favorite: Mariners, Spread: -1.5, Total: 7.5, Favorite Moneyline: -205, Underdog Moneyline: +172)
• 8/7/2024: 6-2 DET (Favorite: Mariners, Spread: -1.5, Total: 6, Favorite Moneyline: -142, Underdog Moneyline: +120)

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